Name  ______________________



Group_______________________






Extra Homework Assignment for statistics (Lots of fun!!!)


Which model does the best job in explaining y? Please explain your answers.



Model 1


y =

   300C +

         37 x +

                   42 z

                             (R^2=.42)



         (t = 1.84)

                   (t = 2.08)

                             (adj. R^2=.39)



Model 2


y =

   400C +

         23 u +

                   47 z

                             (R^2=.35)



         (t = 2.84)

                   (t = 2.01)

                             (adj. R^2=.30)



Model 3


y =

   200C +

         18 u +

                   47 z +

                             20 v

                                       (R^2=.38)



         (t = 2.54)

                   (t = 2.00)

                             (t = 2.60)

                                       (adj. R^2=.28)